By Bob Difley
Some RVers like to stick it out in the desert until the increasing heat thoroughly thaws out their bones before moving north. However, some spring days can easily reach into the 90s — even triple digits. When you’re dry camping, then running an air conditioner from your main engine or a generator for hours should not be an option.
There are two effective methods to control your interior heat. One is to buy a roll of heat-reflective, foil-backed insulation (available from Home Depot and other building materials or hardware stores) and cut sections to fit your front and side windows that face the sun during midday. Taped on your windows they will reflect most of the sun’s heat. Open the rest of the windows to allow air circulation.
Another method is to install — if it isn’t already installed — a Fan-tastic Vent (photo). This vent and fan operates on very low amperage and can run for hours off your batteries without pulling too much juice out of them. Set to the highest speed, the fan will turn over the air in your rig in minutes. During the hottest part of the day, set it to draw the hot air out. During cooler periods in late afternoon or early evening, set it to reverse and draw in the cooler outside air.
By monitoring your internal and outside air temperatures, you can close your windows when the outside air is hotter than inside. Then when the outside air cools to below the inside temperature, open all the windows to encourage thorough ventilation replacing the inside hot air.
You can find Bob Difley’s RVing e-books on Amazon Kindle.